Pipe mitering apparatus



Jall- 25, 1949. M. N. LEBEDEFF 2,459,823

. PIPE MITPRING APPARATUS 3 Sheets-Sheet 1 Filed Feb. 11, 1946 Jan. 25, 1949. M. N. LEBEDEFF 2,459,823

PIPE MITERING APPARATUS Filed Feb. 1l, 1946 5 Sheets-Sheet 2 M. N. LEBEDEFF PIPE MITERING APPARATUS `lan. 25, 1949.

Filed Feb. 11, 194e 3 Sheets-Sheet 5 Patented Jan. 25, 1949 PIPE MITERING APPARATUS Michael N. LebedeIl, Chicago, lll., asslgnor to Chif cago Bridge & Iron Company, a corporation of Iliinois 'Application February 11, 1946, Serial No. 646,889

l This invention relates to an apparatus such as a pipe mitering apparatus for cutting an object at a desired angle to an axis of the object.

It is often diiiicult to cut large objects such as pipe of large diameter so that an even cleavage will be accomplished, and so that the cut ends of two objects will flt. I have invented a mitering apparatus that is particularly useful on pipes, and with which the objects can be cut at any desired angle to an axis oi the object. The apparatus comprises broadly a base member attachableV to the object to be cut, a guide member pivotally mounted on the base member and movable to a desired angle with respect to the axis, cutting means carried by the guide member for cutting the object with the cutting means being movable relative to the guide member, and means for causing relative movement between the cutting means and the unit comprising said object, base member, and guide means. With this apparatus it is possible to cut objects at any desired angle and in any desired plane, no matter what the size and weight of the object. The apparatus is easily adjustable to accommodate objects of different sizes, and the angle of cutting can be readily changed.

The invention will be described as related to the embodiment shown in the accompanying drawings. Of the drawings Fig. 1 is a side elevation of a pipe mitering apparatus embodying the invention; Fig. 2 is a front end elevation of the apparatus; Fig. 3 is a vertical section taken along line 3-3 of Fig. 1; andFig. 41s a vertical section taken along line 4--4 ofv Fig. 1.

The pipe mitering apparatus shown in the accompanying drawings comprises a cylinder I0 having a diameter larger than the pipe I I, which is intended to be cut, an annular guide member I2 pivotally held on the cylinder Ill and a cutting torch I3 supported on the guide' member I2 and movable relative thereto.

The cylinder I0 is placed around the pipe'l II and is clamped to the pipe. The pipe rests on a holder I4 having rollers I5 contacting the pipe. With this arrangement the pipe II, cylinder I0, and annular guide member I2 may be rotated around the central axis of the pipe.

The annular guide member I2, which is in the form of a cylinder; has a diameter larger than that of the cylinder II) and is pivotally mounted on a pair of brackets IB extending from the front face of the cylinder with the two brackets being located substantially diametrically opposite each other in a horizontal plane. The annular guide member I2 has a raised edge l1 of circular shape e cyims. (CL :i3-ari" atits front surface. This raised edge I1 serevs as a guide for the support I8 holding the burning torch I3.

The support I8 which holds the burning torch I3 is in the form of a carriage that extends over a wide arc of the raised edge I1. The support I8 is movably held on the raised edge II by means of a plurality of wheels I9, 20, 2l, and 22 contacting the edge. Wheels I9 and 20 are at the ends of the support I8 and are inclined back from the edge I1. Wheels 2l and 22 are at substantially the top of the support and are arranged in the shape of a V with their adjacent surfaces contacting opposite sides of the edge I1. Greater stability is given to the support I8 by providing a pair of wheels 23 on the bottom of the support I8 and contacting the `iront face of the annularv guide member I2.

The cylinder III is attached to the pipe II by` providing a pair of rockers 24 rockably mounted on the front portion of the cylinder l0 on opposite sides of the vertical center of the cylinder. Each rocker 24 has two contact points 25 on opposite ends thereof for contacting the surface of the pipe I0. The. pairs of contact points are on opposite sides of the vertical center of the pipe I0. Similar rockers 26 are provided at the rear of the cylinder IIJ, and these rockers have similar contact points 21. The l'rear rockers 26 have a spring 28 extending between them. All the contact points 25 and 21 are mounted on threaded posts 29 extending through the rockers so as to permit adjustment of the contact points. The rocker arrangement is provided so thatadequate contact may be provided on pipes of varying diameter. The pipe I0 is Vclamped against the rockers by means of a pair of clamps 30 provided on the bottom portion of the cylinder I0 and normally contacting the bottom of the pipe. II. Similar clamps 3l are provided on 4top of the cylinder I0 in order to obtain a more positive clamping action at this portion of `the cylinder. In operation the cylinder I0 is placed around thevpipe II. The cylinder is immediately supported on contact points 25 and 21. The bottom clamps 30 are then turned until the pipe is held securely between these bottom clamps and the contact points. Then the top clamps 3l are turned until they also contact the pipe, thus providing rigid clamping of the pipe within the mitering apparatus.

The annular guide member I2 is rotatable on its brackets I6 to a desired angular position relative to the central axis of the pipe I I. In order to hold the guide member in position there is 3 provided a rod I2 hingedly attached to the top of the 'guide member I2 and slidably attached to the cylinder Il. Mounted upon the cylinder I4 is a member I4 having therein a wedge shaped groove Il extending longitudinally of the axis of the cylinder. The rod 32 is pivotally connected to a slider 34, the slider having a lower wedge shaped portion adapted to slide in the groove Il.` The slider 3l is provided with a vertical set screw 31 adapted to press against the bottom of the member 34 to hold the slider in any position by wedging it against the groove N. Thus, the annular guide member I! may be rotated through its are and clamped in any desired position by tightening the set screw I1.

After the cylinder Il has been placed on the pipe II and attached thereto. cutting is accom plished by holding the support Il for the torch lI3 stationary and rotating the pipe II, cylinder I0. and guide member I2 about the center oi' the pipo II. This holding is accomplished by providing a rigid brace 3l extending from the support I8 to the ground or other base. As shown in Fig. 2, when the cylinder and pipe are turned in a clockwise direction the brace 38 will hold the support I il and the burning torch I3 stationary, while the name 39 from thetorch I3 cuts the pipe along aline 40.

The torch I3 is mounted in a collar 4I and may be moved toward or away from the pipe by sliding it within the Ycollar and may be clamped in such position by tightening the set screw 42. The collar 4I is mounted upon a bar 43 which is fixed to -a vertical rod 44 which is attached to a collar 45. The collar 45 surrounds a rod 46, which rod is mounted upon and extends away from the guide member. By loosening the set screw 41, the collar 45 may be slid upon the rod 46 and hence the bar 43, collar 4I and torch i 3 may be moved toward and away from the guide member.

Having described my invention as related to one embodiment of the same, it is my intention that the invention be not limited by any of the details oi.' description unless otherwise specified, but rather be construed broadly within its spirit and scope as set out in the accompanying claims.

I claim:

l. Apparatus for cutting pipe or the like at a desired angle to the central axis of said pipe comprising mounting means holding the pipe for rotation substantially about its central axis, a cylinder of larger diameter than the pipe, means for attaching the cylinder to said pipe, an annular guide member of larger diameter than said pipe pivotally mounted on the cylinder at points substantially diametrically opposite each other, a raised section rigidly secured to said annular guide member having a substantially circular shape, means for holding said annular guide `member at a desired angular position with respect to the central axis of the pipe, cutting means carried on the raised section of the guide member for cutting the pipe, a plurality of rollers mounted on the cutting means with the cutting means being movable on said rollers relative to said raised section, and means: for holding the cutting means substantially stationary during rotation oi' the pipe, cylinder and guide member.

2. Apparatus for cutting pipe or the like at a desired angle to the central axis of said pipe comprisng mounting means holding the pipe for rotation substantially about its central axis; a cylinder of larger diameter than the pipe; means for attaching said cylinder to the pipe including a pair o! members rockably mounted on. said cyl- I inder near one end thereof and another pair of said members similarly mounted on the other end of the cylinder, cach pair oi' members being located on opposite sides of the vertical center of the cylinder near the top and each member havlng two contact portions for contacting the pipe on one side of said vertical center, and clamps on the bottom portion of the cylinder for clamping the pipe against said contact portions; an annular guide member of larger internal diameter than the external diameter ot the pipe .and of the cylinder pivotally mounted on arms extending from one end of the cylinder with said arms being substantially'- parallel to each other in a substantially horizontal plane with said plane substantially bisecting the cylinder; a raised section on said annular guide member ol'l substantially circular shape;vmeans for holding said annular guide member at a desired angle to the central axis` of the pipe. cutting means carried on the raised section of the guide member for cutting the pipe with the cutting means being'movable on said raised section. and means for holding the cuttingmeans substantially stationary during the rotation of the pipe, cylinderLfai'idl guide member.

3. 'I'he apparatus of claim 2`wherein the cut;A ting .portion of the cutting means is adjustable toward and away from the pipe and toward and away from the guide member.

4. Apparatus for cuting pipe or the like at a desired angle tothe central 'axis oi' said pipe comprising mounting means holding the pipe for rotation substantially about its central axis; a cylinder of larger diameterthan the pipe; means for attaching the cylinder to the pipe including at least 911e member -rockably mounted on said cylinder and having contact portions for contacting the pipe, and a clamp for clamping the pipe against said contact portions; an annular guide member of larger diameter than said pipe pivotally mounted on the cylinder at points substantially diametrically opposite each other; a raised section on the said annular guide member having a substantially circular shape; means for holding said annular guide member at a desired angular position with respect to the central axis of the pipe; cutting means carried on the raised section of the guide member for cuttingthe pipe with the cutting means .being movable on said raised section; and means for holding the cutting means substantially stationary during rotation of the pipe, cylinder and guide member.

5. Apparatus for cutting pipe or the like at a desired angle to the central axis of said pipe comprising mounting means holding the pipe for rotation `substantially about its central axis; a cylinder of larger diameter than the pipe; means for attaching the cylinder to said pipe including a pair of members rockably mounted on said cylinder near one end thereof and another pair of said members similarly mounted on the other end of the cylinder, with each member having two contact portions for contacting' the pipe, and clamps on a' portion of the cylinder opposite the contact portions for clamping the pipe against said contact portions; an annular guide member of larger diameter than said pipe pivotally mounted on the cylinder a't points substantially diametrically opposite each other; a raised section on the said annular guide member having a substantially circular shape; means for holding said annular guide member at a desired angular position with respect to the central axis of the pipe; cutting means carried on the raised section of the guide member for cutting the pipe with the cutting means being movable on said raised section; and means for holding the cutting means substantially stationary during rotation of the pipe, cylinder and guide member. i

6. Apparatus for cutting pipe or the like at a desired angle to the central axis of said pipe 60mprising mounting means holding the pipe for rotation substantially about its central axis; a cylinder of larger diameter than the pipe, means for attaching the cylinder to said pipe, an annular guide member of larger diameter thandsaid pipe pivotally mounted on the cylinder at points substantially diametrically opposite each other, a raised section on said annular guide member having a at front face and having a substantially circular shape, means for holdingi said annular guide member at a desired angular position with respect to the central axis of the pipe, cutting means carried on the raised section of the guide member for cutting the pipe with said cutting means extending over a substantial arc of said raised section of the guide member, roller members supporting the cutting means and con- 25 tacting the raised section on either side of the center of said arc, roller members supporting the cutting means and contacting .the front face of said annular guide member whereby the cutting means is movable on said roller relative to said raised section, and means for holding the cutting means substantially stationary during rotation of the pipe, cylinder, and guide member.

MICHAEL N. LEBEDEFF.

REFERENCESl CITED The following references are of record in the ille of this patent:

UNITED STATES PATENTS 540,180 Germany Dec. 11, 1931 

